I changed my oil for the first time this past weekend. Afterwards, the shifter would not go into reverse. I realized that I had clamped the cables with the under-engine tray. I used a yard stick to hold the control cables out of the way the second time I put the tray on and this worked out fine. Has anyone had this problem? Also, now my blinkers do not work. The lights on the dash are fine and I cannot hear the relay clicking. Any ideas?